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Edward Yoon commented on HADOOP-2291: ------------------------------------- I tried estimator. (random alphabet combination 1 million ~ 10 billion rows) Row count error range is too large. > [hbase] Add row count estimator > ------------------------------- > > Key: HADOOP-2291 > URL: https://issues.apache.org/jira/browse/HADOOP-2291 > Project: Hadoop > Issue Type: New Feature > Components: contrib/hbase > Reporter: stack > Assignee: Edward Yoon > Priority: Minor > Attachments: Keying.java > > > Internally we have a little tool that will do a rough estimate of how many > rows there are in a dataHbase. It keeps getting larger and larger partitions > running scanners until it turns up > N occupied rows. Once it has a number > > N, it multiples by the partition size to get an approximate row count. > This issue is about generalizing this feature so it could sit in the general > hbase install. It would look something like: > {code} > long getApproximateRowCount(final Text startRow, final Text endRow, final > long minimumCountPerPartition, final long maximumPartitionSize) > {code} > Larger minimumCountPerPartition and maximumPartitionSize values would make > the count more accurate but would mean the method ran longer. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.